Help with chrony work
I find my gun to be very inconsistent and I am not entirely sure why, it is a KG Cricket Compact .22 and here are some different shot strings using the 18,1gr JSB. Could anyone give any tips on how to make it better? Or am I expecting too much? I have put at least 1500 pellets through it probably closer to 2000.
First sting
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263
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HIGH 266. LOW 260
IN FPS HIGH 873 LOW 853
Here is another
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HIGH 270. LOW 265
IN FPS HIGH 886 LOW 869
and another
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HIGH 269 LOW 265
IN FPS HIGH 882 LOW 869
So what do the experts say? I am honestly lost and do not know what conclusion to make.
All Replies
Viewing 12 replies - 1 through 12 (of 12 total)
Also, for the sake of explanation, keep in mind that just because a pellet that shot at 880 FPS at the muzzle doesn’t necessarily mean its speed will also be 830 FPS at 25 yards like the pellet that was shot before it that was at 880 FPS at the muzzle and 830 FPS at 25 yards. The velocity could be higher or lower…depending on which side the coin lands on when you flip it. :winkn:
Ok, so you guys think it is ok, good to know. Your opinion is the reason for posting and now I do not have to worry about it, thanks guys
Valve is 1/2 turn from touch down
Bro,,, i don’t see any big issue in your ES especially in MPS ,,, just try the accuracy if she is accurate then just go to hunt and that is it…
What is your valve spring retainer? How many turns after contact with the spring ?? 😉
I want less spread, but as I stated in the first post, I might be expecting too much..
Cricket can you tell us what wrong is with your shot strings??? Maybe little more hammer spring just 1/2 turn. That’s enough…
Maybe I should get a new one in FPS :rofl:
yea u need the fraction, its rounding off the decimal fraction in mps is 3x more then in fps.
Still not that bad u know, I’ve seen much worst.
~ Greg
I cannot change to fps, but I can hook it up to the computer and get decimals. I just do not like the spread, it cannot have a good effect on accuracy
Those numbers look consistent to me when analyzing the velocities in feet-per-second. Don’t get too hung up on the extreme spread. The shot-to-shot variation on the numbers you provided are very good.
Not sure but it could be that your chrony is reading in mps ……..
It might read more accurately if u set it to output read in fps instead ?
Still not that bad u know, I’ve seen a lot worst.
~ Greg
Viewing 12 replies - 1 through 12 (of 12 total)
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The best result with the value tension is between 1/2-1 turn after contact.
But that’s just me, I tried lower then 1/2 and high then 1 and got poor results like air inefficiency or a louder hammer slap.
IIRC 1/2 turn will also change the top speed by 10-15 fps, CW decreases and CCW increase the top speed a little.
~ Greg